William fiarsen



oii eccentric,

wat" otjljirr;

WILLVIAMQHARSEN, or GREEN POINT,` NEW Yoan.

r Leners' Patent No. 100,619, wed March. s, 1ero.

:hannover/Inru- IN VARIABLE CUT-orf' vALvn-Gnan To all whom 'it mayconcern: i

, I e it known that I, WILLIAM HARSEN, of vGreen Point, in the county ofKings, and Stateof New York,

-have invented' a new anduseful Improvement in Variable CutfOEValve-Gear, of which the following is a full, clear, and exactdescription, reference being had "to the accompanying drawing formingpartl of this parts.

My improvement-has referenceto cut-'oli` gears or motions `in which, thesupply of steam is `cut oil' at any desired point in `the stroke of anengine by a sec ondary or cut-oil' valve, operated by an adj ustablcecdrive the m'an valve.

centric, which 4is distinct `from the eccentric Aused to Inthisconnection the invention consists, in combination with a.- hollow ortubular crank-shaft and ec centric thereon, for operating the main valveof a secondary eccentric for controlling fthe cut-cti' valve, arrangedto rotate. in a planewhich is a paiallelto the first-mentionedeccentric,- but adj ustable in relation thereto, for the purpose ofcutting oli` earlier or' later in thestroke by forming thecut-oeccentric'with a hollow sleeve that takes its bearing within the tubularshaft, and has a spil'al Slot` in or along it, through which a followerpasses and .projects into a longitudinal l,or straight groove in theinterior of said' shaft, so that while `the latter serves to rotate thecut-off eccentric, through gear 'of the follower with fit, saidcccentrlcrismade capableof necessary adjustment by" `a Vlongitudinalsliding movement ofthe follower, as

effected by a rmlarranged to project tln'onglrthe cut- Such combinationforms a very simple, efcient, and durable arrangement of means, capableofopeiation either by the governor or by` hand, for establish' ing avariable action to the cut-oil valve.

.Referring to4 theaccompanying drawing- A represents the crank-shaft ofthe engine', made tubular, as represented in iigs. 2 and 3;

B, the crank; and v i i C, the fixer'. eccentric, for giving motion tothe main valve.

D is the secondary or adjustable eccemntric for op-4 `erating the-cutloffvalve,` which may be arranged on back of the nian valve iorcontrollingthe admission. v

of steam to orthroughthc latter.

This secondary" eccentric D has a 4fixed plane of rof The Schedulereferred to in these Letters Patent and making part of the same.

v tation outside of the maineccentric C and parallel to the latter',with which it revolves in common, but is adjustable soas to establishmore or less lead to the secondary valve, accordingly as it is requiredto cut od' earlier' or later in the stroke.

The means lby which this is accomplished are as follows: f

Said eccentric D is formed with 4a hollow sleeve, E,

l arranged to t and rotate within the tubular shaft A,

that serves as a bearing to it. y

This' sleeve carries within it a longitudinally-sliding follower, F,capable of operation from the exterior by a rod, G, arranged to projectthrough the secondary eccentric in the axial direction of thecrank-shaft, or thereabout.

This follower F is fitted to project through a spiral Y slot, a, made inor along the sleeve E, and further'- more, to 'enter and lit a straightlongitudinal groove, b, formed in-the interior of the shaft A.

` From this description it will beseen that on the sleeve E beingrestricted from longitudinal movement,

which may be secured by the eccentric D, at one end,

and a collar, c, at the other end ot it, either forward or backwardadjustment, in the plane of its rotation, may be given to the eccentricD, to give an earlier or later cnt-off action to the secondary valve` bysimply sliding in or out, in the axial direction of the shaft A, the rodG, and of a necessity communicating a corresponding motion to thefollower F, which, by its gear with the sleeve E and 'shaft A,throughthe spiral slot a, and straight groove b, turns the eccentric D,as required to effect the necessary adjustmentu of it, said follower Ffurthermore .Y serving to act as a diiver'to the eccentric D to rotateit in common with the shaftjA.

The rod G may either be slid in or out by hand, through any suitableinea-ns to give any desired amount of eut-oli required, by altering theset of the eccentric D relatively toA clank B or iixed eccentric C, orit may be geared or connected so as to be operated by the governor ofthe engine. In either case the invention forms an adjustable or variablecnt oi` gear,

which is simple, compact, eiiicient, or easy to work',-

and durable, not liable to get out 0f order, and securl ing an extensiverange of ,cut-off action.

.The arrangement of the `spirally-channeled sleeve E of the eccentric Dand its follower F, within the lcngitudinally-grooved hollow shaft A ofthe eccentric C and crank B, as shown and described.

' WM. .HARSEN Witnesses: j

FRED. HAYNES, HENRY PALMER.

